This tutorial will guide you to create customized feature analysis for cohort characterization.

Cohort characterization describes the baseline and post-index characteristics of people in a cohort. OHDSI approaches characterization through descriptive statistics of all conditions, drug and device exposures, procedures and other clinical observations that are present in the person’s history. We also summarize the socio-demographics of members of the cohort at the index date. This approach provides a complete summary of the cohort of interest. Importantly, this enables a full exploration of the cohort with an eye towards variation in the data while also allowing for identification of potentially missing values. —Book of OHDSI Chapter 11

Cohort characterization methods can be used for person-level drug utilization studies (DUS) to estimate the prevalence of indications and contraindications amongst users of a given treatment. The dissemination of this cohort characterization is a recommended best practice for observational studies as detailed in the Strengthening the Reporting of Observation Studies in Epidemiology (STROBE) guidelines. (Elm et al. 2008) –Book of OHDSI Chapter 11

1.Click New Feature analyses tab

2.Enter new analysis descriptions

3.Choose the design for new analysis

4.Create design logic

5.Create new characterization design

6.Design your characterizations

7.Excute the cohort characteristics design